PLEASE NOTE: Public works projects (construction) are not included on this page. For bid information including planholder lists on public works projects, please contact ENGINEERING SERVICES at 925-756-1900 or check the Projects page of this website.

Current Requests for Proposal

Cogeneration System Improvements Project

The District is seeking proposals from qualified engineering consulting firms for the Cogeneration System Improvements Project (Project). The Request for Proposals (RFP) describes the Project’s goals and scope of work which includes an alternatives analysis, predesign activities, and detailed design to replace existing aging infrastructure at the District’s Wastewater Treatment Plant. Interested consulting firms are encouraged to participate in the consultant selection process as defined in the RFP. Please note that a non-mandatory pre-proposal meeting and site walk is scheduled on December 7, 2022 at 12:30 PM at the District’s offices (2500 Pittsburg-Antioch Highway, Antioch, CA 94509).  Proposals, meeting all of the RFP requirements, must be submitted to the District no later than 2:00 PM on January 9, 2023.

Bids and Requests for Proposal

Delta Diablo (District) uses Periscope (formerly BidSync)  for most non-public works bids and RFP's.  Please register here and you will automatically be notified of upcoming opportunities. 

Purchasing Contact Information 
Delta Diablo 
Purchasing Division 
2500 Pittsburg-Antioch Hwy 
Antioch, CA 94509 
925.756.1968 
purchasing@deltadiablo.org